CN113494427A

CN113494427A - Wind power generation tower and preparation method thereof

Info

Publication number: CN113494427A
Application number: CN202110912966.2A
Authority: CN
Inventors: 李勇芝; 吴愧; 缪李红; 张明欣; 崔毅斌
Original assignee: Shanghai Electric Wind Power Group Co Ltd
Current assignee: Shanghai Electric Wind Power Group Co Ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2021-10-12
Anticipated expiration: 2041-08-10
Also published as: CN113494427B

Abstract

The invention relates to the field of manufacturing of wind power generation devices, in particular to a wind power generation tower and a manufacturing method thereof. The concrete method comprises the steps that 1, a tower section is made of steel plates, and the steel plates are connected end to carry out girth welding; 2. performing flange welding on tower sections for manufacturing the bottom and the top of the tower; 3. and sequentially splicing the end surfaces of the tower sections, and performing girth welding on the spliced end surfaces to manufacture the tower. The invention reduces the number of flanges, reduces the number of torque platforms of the interior trimming part of the tower and reduces the cost of the tower; need not to use high strength fastener between the tower section, avoided the risk that is brought by high strength fastener is not hard up.

Description

Wind power generation tower and preparation method thereof

Technical Field

The invention relates to the field of manufacturing of wind power generation equipment, in particular to a wind power generation tower and a manufacturing method thereof.

Background

When designing a tubular steel tower, whether for onshore or offshore projects, the tower 10 is divided into sections 11 for ease of tower production and transport. In the conventional structure, as shown in fig. 1, flanges 12 (tower sections with flanges and interior trim parts) are respectively mounted at both ends of a tower section 11, so that the tower sections are connected by the flanges through high-strength fasteners. The design life of the tower 10 is typically 25 years, because the tower 10 vibrates frequently, and the high strength fasteners between adjacent tower sections 11 need to be serviced periodically, as shown in FIG. 2, so a torque platform 14 is provided about 1200mm below the fasteners for servicing the fasteners. The marine type is usually limited by a welding field, a rated load of a hoisting device in a factory building and a sand blasting paint room, and is usually designed in three or four sections. Flanges 12 are arranged between adjacent tower sections 11, the flanges 12 are connected through high-strength fasteners, and welding and painting are finished indoors when each section of tower section is welded and sandblasted to meet the standard specification requirements.

The following problems exist with the current tower structure and method of manufacture:

1. at present, a plurality of tower sections are divided to be sent to a wind field, fasteners between the tower sections are fastened in the wind field, and the workload in the wind field is very large; the installation time of a single unit is longer;

2. the window period of offshore operation is short under the influence of weather, and the construction cost is high due to the fact that the waiting time of the hoisting ship at the machine position is prolonged by sectional hoisting;

3. under the influence of tower vibration, fasteners between tower sections have major risks of loosening, breaking and the like;

4. each tower section is connected through flanges and fasteners, the number of the flanges is large, the flanges are forged pieces, and the cost of the forged pieces is high;

5. moment platforms need to be arranged between adjacent tower sections to maintain the connecting fasteners between the tower sections, the weight of each moment platform reaches 2-3T, and the cost is high;

6. flanges are connected between the tower sections, the flatness of the welded tower sections is required to be 0-2 mm, the inward inclination value is generally required to be 0.3-1.5, the flanges are not allowed to be turned outwards, the requirement on the large-diameter tower sections on the sea is high, and the welded tower sections are easy to exceed the tolerance range;

7. the longest length of the tower section reaches 36 meters, the length is difficult to control, the installation of interior trim parts (such as a ladder stand and a cable rack) among the tower sections is influenced, all the interior trim parts (the ladder stand and the cable rack) are installed in a manufacturing plant at present, the existing tower section manufacturing comprises the interior trim parts, and after the tower sections on site are connected through fasteners, the ladder stand and the cable rack between the sections are connected on site.

In view of the above disadvantages, it is urgently needed to invent a tower frame which has low cost, high structural strength and easy maintenance, so that the number of flange connections between tower sections needs to be reduced to reduce the number of moment platforms so as to reduce the cost; and the time of field installation is reduced, and labor and time cost are reduced.

Disclosure of Invention

In order to achieve the purpose, the invention provides a wind power generation tower, wherein a bottom flange is installed at the bottom of the tower, a top flange is installed at the top of the tower, and the tower is formed by welding a plurality of sections of tower sections through girth welding.

Preferably, the tower section is provided with a plurality of reinforcing ribs at different heights along the inner wall of the tower section in the circumferential direction uniformly.

Further, each tower section is cylindrical or conical.

Furthermore, each tower section is formed by rolling a single steel plate in an end-to-end connection mode, and longitudinal seam welding is carried out on the end-to-end connection positions of the steel plates.

Wherein, the bottom flange of the tower is used for positioning and installing the tower, and the top flange is used for installing the hub on the tower.

Preferably, two tower sections located in the middle of the tower can be connected through flanges according to the strength requirement of the tower, and the rest tower sections are connected through girth welding.

The invention also provides a preparation method of the wind power generation tower, which is used for preparing the wind power generation tower and specifically comprises the following steps:

s1: preparing tower sections by adopting steel plates, rolling each single steel plate end to prepare the tower sections, and performing longitudinal seam welding on the joints of the steel plates end to end;

s2: performing bottom flange welding on a tower section for manufacturing the bottom of the tower frame, and performing top flange welding on a tower section for manufacturing the top of the tower frame;

s3: and connecting the tower sections in sequence to manufacture the tower.

Preferably, the step S1 includes welding the middle flange to the connecting end face of the two tower sections at the middle part of the tower according to the tower strength requirement.

In the step S3, end face welding is performed on each tower section or two adjacent tower sections in the middle are connected through a middle flange, and a support structure is installed inside each tower section near the welding end face;

and further, after the end faces of two adjacent tower sections are welded, the supporting structure is dismantled.

Wherein the support structure comprises: support the ring, along many spinal branchs vaulting pole that the hoop of supporting the ring set up, every the first end of bracing piece with support ring lateral wall fixed connection, second end fixedly connected with fixing device, the inside wall fixed connection of each fixing device and tower festival.

Preferably, the support rod is formed by sequentially connecting a first connecting plate, an adjustable plate and a second connecting plate; the first end of the first connecting plate is connected with the outer side wall of the supporting ring, the second end of the first connecting plate is detachably connected with the first end of the adjustable plate, the second end of the adjustable plate is detachably connected with the first end of the second connecting plate, and the second end of the second connecting plate is connected with the fixing device.

Preferably, the length of the supporting rod is adjusted by adjusting the length of the adjustable plate so as to adapt to tower sections with different inner diameters.

Preferably, the step S3 includes the following: before the tower sections are connected, reinforcing ribs and interior trim parts are installed on the inner walls of the tower sections, paint spraying treatment is carried out on the inner side surfaces and the outer side surfaces of the tower sections provided with the reinforcing ribs and the interior trim parts, and paint spraying treatment is not carried out on the positions, to be connected, of the reserved tower sections.

The invention has the following beneficial effects:

1. the number of flanges is reduced, and the tower purchasing cost is reduced;

2. the number of torque platforms of the interior decorative part of the tower frame is reduced, and the purchase cost of the tower frame is reduced;

3. high-strength fasteners are not needed in the tower frame, so that the risk caused by the high-strength fasteners is avoided, the time of offshore hoisting operation is shortened, and the operation and maintenance cost in the whole life cycle is reduced;

4. the assembly of the interior trim parts of the tower frame is completely finished in a manufacturing plant, so that the risk that the interior trim parts cannot be matched when tower sections provided with the interior trim parts are butted is avoided.

Drawings

FIG. 1 is a schematic view of a prior art tower;

FIG. 2 is a schematic structural view of a prior art internal moment platform of a tower;

FIG. 3 is a schematic view of a tower of the present invention;

FIG. 4 is a schematic structural view of the reinforcing ribs inside the tower section of the present invention; (a) the structure of the reinforcing rib of one embodiment is schematically shown; (b) the structure of the reinforcing rib is a schematic diagram;

FIG. 5 is a sectional view showing the internal structure of the tower section according to the present invention; (a) the mounting distribution diagram of the reinforcing ribs in one embodiment; (b) a mounting profile for a reinforcing bar according to another embodiment;

FIG. 6 is a schematic view of the welding between tower sections of the present invention;

FIG. 7 is a schematic view of a support structure for the support tower section of the present invention;

FIG. 8 is an enlarged view of the fastening device portion of the support structure of the present invention;

FIG. 9 is a schematic view of a tower weld paint mask of the present invention;

FIG. 10 is a schematic view of the tower welding paint shielding tool.

Detailed Description

The following provides a wind power tower and a method for manufacturing the same, which are described in detail with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

The invention provides a wind power generation tower, which mainly aims to reduce the number of flanges of the tower, reduce the later operation and maintenance cost and reduce the risk caused by loosening of connecting bolts between the flanges, and a moment platform 14 shown in figure 2 does not need to be arranged inside the tower. As shown in fig. 3, in the wind power tower of the present invention, flanges 12 are installed at the bottom and the top of the tower 1, the flange 12 at the bottom is used for positioning and installing the tower 1, and the flange 12 at the top is used for installing a hub on the tower 1; the tower 1 is formed by welding a plurality of tower sections 11 through girth welding, and the overall height of the tower 1 ranges from 70 meters to 130 meters.

For the purpose of the present invention, the tower sections 11 can be connected by a small number of intermediate flanges, but most of the tower sections 11 are connected by welding, as shown in fig. 3, in the preferred embodiment, two tower sections 11 in the middle of the tower 1 can be installed with intermediate flanges 12 'according to the requirement of the strength of the tower 1, the intermediate flanges 12' are connected by fasteners, and the rest of the tower sections 11 are connected by girth welding to form the tower 1.

As shown in fig. 4, in order to increase the rigidity of the tower section 11, a plurality of reinforcing ribs 13 are circumferentially installed on the inner side wall of the tower section 11 by welding, and each reinforcing rib 13 is arranged along the axial direction of the tower section 11. As shown in fig. 4(a), the cross-sectional structure of each reinforcing rib 13 is a steel block with a middle protruding and two narrow ends, and as shown in fig. 5 (a), the reinforcing ribs 13 are uniformly distributed along the inner side wall of the tower section at different heights of the tower section 11. Or as shown in fig. 4(b), each reinforcing rib 13 is a pair of steel blocks with triangular cross sections and arranged in mirror symmetry, and as shown in fig. 5(b), the reinforcing ribs 13 are uniformly distributed along the inner side wall of the tower section at different heights of the tower section 11 in the circumferential direction. The number of the reinforcing ribs 13 arranged on each tower section 11 can be different, the strength calculation is carried out according to the actual height of the tower frame 1 where the tower section 11 is located, the diameter, the wall thickness and other parameters of the tower section 11, so as to determine the number of the reinforcing ribs 13 required to be arranged on the tower section, and the reinforcing ribs 13 are not required to be arranged according to the rigidity requirement of the tower section 11.

In this embodiment, each tower section 11 is formed by rolling a single steel plate in an end-to-end connection manner, longitudinal seam welding is performed at the end-to-end connection position of the steel plates, and each tower section 11 is cylindrical or conical.

s1: preparing tower sections 11 by adopting steel plates, rolling each single steel plate end to prepare one of the tower sections 11, and performing longitudinal seam welding on the joints of the steel plates end to end;

s2: performing bottom flange welding on the tower section 11 for manufacturing the bottom of the tower frame 1, and performing top flange welding on the tower section 11 for manufacturing the top of the tower frame 1;

s3: and connecting the tower sections 11 in sequence to manufacture the tower frame 1.

Wherein, the step S1 includes welding the middle flange 12' to the connecting end face of the two tower sections 11 at the middle part thereof according to the strength requirement of the tower 1.

In a preferred embodiment, the step S3 includes welding the end surfaces of the tower sections 11 or connecting two adjacent tower sections 11 in the middle by the intermediate flange 12', and installing the support structure 2 inside each tower section 11 near the welded end surfaces.

As shown in fig. 6, the end portions of adjacent tower sections 11 are connected by girth welding, and the end surfaces of the tower sections 11 are deformed due to high temperature during welding, so that a support structure 2 is arranged inside each tower section 11 and close to the welding end portion during girth welding to ensure the ovality of each tower section 11, and the support structure 2 is removed after welding.

As shown in fig. 7 and 8, the support structure 2 includes: support ring 21, along many spinal branchs vaulting pole 22 that support ring 21 hoop set up, every the first end of bracing piece 22 and the lateral wall fixed connection who supports ring 21, second end fixedly connected with fixing device 23, the inside wall fixed connection of each fixing device 23 and tower section 11, so that bearing structure 2 is fixed to be set up inside tower section 11. It should be noted that the reinforcing ribs 13 provided on the inner side wall of the tower section 11 need to be distributed with the supporting structure 2 in a staggered manner.

The support rod 22 is formed by sequentially connecting a first connecting plate 221, an adjustable plate 222 and a second connecting plate 223 through bolts; the first end of the first connecting plate 221 is fixedly connected with the outer side wall of the supporting ring 21, the second end of the first connecting plate 221 is detachably connected with the first end of the adjustable plate 222 through a bolt, the second end of the adjustable plate 222 is detachably connected with the first end of the second connecting plate 223 through a bolt, and the second end of the second connecting plate 223 is connected with the fixing device 23.

To meet the supporting requirements of tower sections 11 with different diameters, the length of the supporting rods 22 can be adjusted by adjusting the length of the adjustable plate 222, so as to adapt to more tower sections 11 with different diameters.

Before girth welding between the tower sections 11, reinforcing ribs 13 and interior trim parts are installed on the inner walls of the tower sections 11, paint spraying treatment is carried out on the inner side surfaces and the outer side surfaces of the tower sections 11 welded with the reinforcing ribs 13 and the interior trim parts, and paint spraying treatment is not carried out on the positions, to be welded, of the reserved tower sections. Specifically, each tower section 11 is transported to a painting workshop for painting, wherein the positions to be welded (including the end surfaces to be welded and the circumferential side surfaces to be welded) of adjacent tower sections 11 do not need to be painted, and after all the tower sections 11 are painted, the tower sections are transported to an open-air site for girth welding and painting. As shown in fig. 9, before welding and painting, the painted tower section 11 area is covered and sealed by the shielding tool 3 shown in fig. 10, the area to be welded is exposed, the welding area is painted after welding, the painted area is shielded by the shielding tool 3, holes on two sides of the shielding tool 3 are matched with the diameter of the tower section 11, the bottom of the shielding tool 3 is of a universal wheel structure, the shielding tool 3 can move according to station change, and the welding and painting quality is guaranteed to meet the standard specification requirements.

In conclusion, the number of flanges is reduced, and the tower purchasing cost is reduced; the number of torque platforms of the interior decorative part of the tower frame is reduced, and the purchase cost of the tower frame is reduced; high-strength fasteners are not needed between the tower sections, so that the risk caused by the high-strength fasteners is avoided, the time of offshore hoisting operation is shortened, and the operation and maintenance cost in the whole life cycle is reduced; the assembly of the interior trim parts of the tower frame is completely finished in a manufacturing plant, so that the risk that the interior trim parts cannot be matched due to butt joint of tower sections (tower sections provided with the interior trim parts and flanges) is avoided.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In the description of the present invention, it is to be understood that the terms "center," "height," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.

Claims

1. The wind power generation tower is characterized in that a bottom flange is installed at the bottom of the tower, a top flange is installed at the top of the tower, and the tower is formed by welding a plurality of sections of tower sections through end surface circular seam.

2. The wind power tower of claim 1 wherein the tower sections are uniformly circumferentially provided with a plurality of ribs along the inner wall thereof at different heights.

3. The wind power tower of claim 1 wherein each of the tower sections is cylindrical or tapered cylindrical.

4. A wind power tower as in any one of claims 1 to 3 wherein each of said tower sections is made by rolling a single steel plate end to end with longitudinal seam welds at the ends to ends of the steel plates.

5. The wind power tower of claim 1 wherein the tower has a bottom flange for positioning the tower and a top flange for mounting the hub on the tower.

6. The wind power tower of claim 1 wherein two of said tower sections at the mid-section of the tower are flanged for strength of the tower and the remaining tower sections are girth welded.

7. A method of manufacturing a wind power tower for manufacturing a wind power tower according to any of claims 1 to 6, comprising the steps of:

s3: and connecting the tower sections in sequence to manufacture the tower.

8. The method for manufacturing a wind power tower according to claim 7, wherein said step S1 includes welding a middle flange to the connecting end surfaces of the two tower segments at the middle portion thereof according to the tower strength requirement.

9. The method for fabricating a wind power tower according to claim 8, wherein said step S3 comprises: carrying out end face girth welding on adjacent tower sections or connecting adjacent tower sections in the middle through a middle flange, and mounting a support structure in each tower section and close to the end face to be welded; and after the end faces of two adjacent tower sections are welded, the supporting structure is dismantled.

10. The method of fabricating a wind power tower according to claim 9, wherein the support structure comprises: support the ring, along many spinal branchs vaulting pole that the hoop of supporting the ring set up, every the first end of bracing piece with support ring lateral wall fixed connection, second end fixedly connected with fixing device, the inside wall fixed connection of each fixing device and tower festival.

11. The method of claim 10, wherein the support rods are formed by connecting a first connecting plate, an adjustable plate, and a second connecting plate in sequence; the first end of the first connecting plate is connected with the outer side wall of the supporting ring, the second end of the first connecting plate is detachably connected with the first end of the adjustable plate, the second end of the adjustable plate is detachably connected with the first end of the second connecting plate, and the second end of the second connecting plate is connected with the fixing device.

12. The method of claim 11, wherein the length of the support rods is adjusted to accommodate tower sections of different internal diameters by adjusting the length of the adjustable plates.

13. The method of making a wind power tower as recited in claim 7, wherein said step S3 comprises the steps of: before the tower sections are connected, reinforcing ribs and interior trim parts are required to be installed on the inner walls of the tower sections, paint spraying treatment is carried out on the inner side surfaces and the outer side surfaces of the tower sections provided with the reinforcing ribs and the interior trim parts, and paint spraying treatment is not carried out on positions, to be connected, of the reserved tower sections.